《生物医学工程专业英语》Unit 12 Models of Population Growth.pptVIP

Models of population growth Nov 28th, 2014 New words assumption 假设 level off 稳定，整平 calculus 微积分，结石 logistic 逻辑的，后勤的 derivative 导数 nutrition 营养，食物 differential 微分，区别的 predator 食肉动物，捕食者 equilibrium 平衡，均衡 proportional 比例的，相称的 explicit 清楚的，坦白的 proportionality 比值，比例性 exponential 指数，指数的，幂的 qualitative 定性的 formulate 用公式表示…，公式化 realistic 现实的，逼真的 immunity 免疫力 rule out 排除，不考虑 incorporate 合并，结合 variable 变量，可变的 independent variable 自变量 Notes (Line 3) rate: 作为名词时，其含义有：“比率”、“速度”、“进度”等，并可作为价值、费用或价格的量度 His pulse-rate dropped suddenly. 他的脉搏突然放慢了。 walk at a/the rate of 3 miles an hour 以每小时3英里的速度行走 a high hourly rate of pay 按小时收取的高报酬 Notes (Lines 16-17) it is a differential equation because it contains an unknown function P and its derivative dP/dt.它是一个微分方程，因为它包含一个未知函数P和它的导数dP/dt。Function作为名词时主要有两个含义：功能（special activity or purpose of a person or thing）和函数（quantity whose value depends on the varying values of others）。作动词时，则表示“起作用”或“具有…功能” What functions can this program perform? 这一程序有哪些功能? to fulfill a useful function 起到有益的作用 His brain seems to be functioning normally. 他的大脑看来功能正常。 Some English adverbs function as adjectives. 英 语中有些副词可作形容词用。 Notes (Line 18) Having formulated a model, let’s look at its consequences.模型公式已经完成，让我们来看看它的结果。Consequence，thing that is a result or an effect of sth else 结果、後果、影响 In consequence = as a result Recent developments could have far-reaching consequences for the countrys economy. 最近的事态变化, 能够对国家的经济产生深远影响。 (Line 18) rule out排 除、不考虑：to decide that something is not possible or suitable；to make it impossible for something to happen；to state that someone will not be able to take part in a sports event； rule something/somebody out of The mountainous terrain rules out most forms of agriculture. 多山的地形排除了大多数农业形式。 He has been ruled out of the match with a knee injury. 他因膝盖受伤而退出了比赛。 Notes Notes (Lines33-34) the family of solutions通解。 Family在这里的含义是：group of things (eg. languages) with common features and a common source 具有相同特征和同一来源的一组事物（如语言）: the Indo-European f